1 | #!/bin/sh |
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2 | # Get modification time of a file or directory and pretty-print it. |
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3 | |
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4 | scriptversion=2010-08-21.06; # UTC |
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5 | |
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6 | # Copyright (C) 1995-2013 Free Software Foundation, Inc. |
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7 | # written by Ulrich Drepper <drepper@gnu.ai.mit.edu>, June 1995 |
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8 | # |
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9 | # This program is free software; you can redistribute it and/or modify |
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10 | # it under the terms of the GNU General Public License as published by |
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11 | # the Free Software Foundation; either version 2, or (at your option) |
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12 | # any later version. |
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13 | # |
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14 | # This program is distributed in the hope that it will be useful, |
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15 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
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16 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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17 | # GNU General Public License for more details. |
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18 | # |
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19 | # You should have received a copy of the GNU General Public License |
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20 | # along with this program. If not, see <http://www.gnu.org/licenses/>. |
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21 | |
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22 | # As a special exception to the GNU General Public License, if you |
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23 | # distribute this file as part of a program that contains a |
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24 | # configuration script generated by Autoconf, you may include it under |
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25 | # the same distribution terms that you use for the rest of that program. |
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26 | |
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27 | # This file is maintained in Automake, please report |
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28 | # bugs to <bug-automake@gnu.org> or send patches to |
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29 | # <automake-patches@gnu.org>. |
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30 | |
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31 | if test -n "${ZSH_VERSION+set}" && (emulate sh) >/dev/null 2>&1; then |
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32 | emulate sh |
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33 | NULLCMD=: |
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34 | # Pre-4.2 versions of Zsh do word splitting on ${1+"$@"}, which |
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35 | # is contrary to our usage. Disable this feature. |
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36 | alias -g '${1+"$@"}'='"$@"' |
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37 | setopt NO_GLOB_SUBST |
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38 | fi |
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39 | |
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40 | case $1 in |
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41 | '') |
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42 | echo "$0: No file. Try '$0 --help' for more information." 1>&2 |
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43 | exit 1; |
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44 | ;; |
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45 | -h | --h*) |
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46 | cat <<\EOF |
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47 | Usage: mdate-sh [--help] [--version] FILE |
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48 | |
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49 | Pretty-print the modification day of FILE, in the format: |
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50 | 1 January 1970 |
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51 | |
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52 | Report bugs to <bug-automake@gnu.org>. |
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53 | EOF |
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54 | exit $? |
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55 | ;; |
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56 | -v | --v*) |
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57 | echo "mdate-sh $scriptversion" |
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58 | exit $? |
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59 | ;; |
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60 | esac |
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61 | |
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62 | error () |
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63 | { |
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64 | echo "$0: $1" >&2 |
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65 | exit 1 |
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66 | } |
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67 | |
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68 | |
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69 | # Prevent date giving response in another language. |
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70 | LANG=C |
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71 | export LANG |
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72 | LC_ALL=C |
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73 | export LC_ALL |
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74 | LC_TIME=C |
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75 | export LC_TIME |
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76 | |
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77 | # GNU ls changes its time format in response to the TIME_STYLE |
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78 | # variable. Since we cannot assume 'unset' works, revert this |
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79 | # variable to its documented default. |
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80 | if test "${TIME_STYLE+set}" = set; then |
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81 | TIME_STYLE=posix-long-iso |
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82 | export TIME_STYLE |
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83 | fi |
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84 | |
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85 | save_arg1=$1 |
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86 | |
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87 | # Find out how to get the extended ls output of a file or directory. |
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88 | if ls -L /dev/null 1>/dev/null 2>&1; then |
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89 | ls_command='ls -L -l -d' |
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90 | else |
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91 | ls_command='ls -l -d' |
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92 | fi |
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93 | # Avoid user/group names that might have spaces, when possible. |
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94 | if ls -n /dev/null 1>/dev/null 2>&1; then |
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95 | ls_command="$ls_command -n" |
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96 | fi |
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97 | |
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98 | # A 'ls -l' line looks as follows on OS/2. |
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99 | # drwxrwx--- 0 Aug 11 2001 foo |
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100 | # This differs from Unix, which adds ownership information. |
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101 | # drwxrwx--- 2 root root 4096 Aug 11 2001 foo |
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102 | # |
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103 | # To find the date, we split the line on spaces and iterate on words |
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104 | # until we find a month. This cannot work with files whose owner is a |
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105 | # user named "Jan", or "Feb", etc. However, it's unlikely that '/' |
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106 | # will be owned by a user whose name is a month. So we first look at |
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107 | # the extended ls output of the root directory to decide how many |
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108 | # words should be skipped to get the date. |
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109 | |
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110 | # On HPUX /bin/sh, "set" interprets "-rw-r--r--" as options, so the "x" below. |
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111 | set x`$ls_command /` |
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112 | |
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113 | # Find which argument is the month. |
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114 | month= |
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115 | command= |
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116 | until test $month |
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117 | do |
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118 | test $# -gt 0 || error "failed parsing '$ls_command /' output" |
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119 | shift |
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120 | # Add another shift to the command. |
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121 | command="$command shift;" |
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122 | case $1 in |
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123 | Jan) month=January; nummonth=1;; |
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124 | Feb) month=February; nummonth=2;; |
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125 | Mar) month=March; nummonth=3;; |
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126 | Apr) month=April; nummonth=4;; |
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127 | May) month=May; nummonth=5;; |
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128 | Jun) month=June; nummonth=6;; |
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129 | Jul) month=July; nummonth=7;; |
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130 | Aug) month=August; nummonth=8;; |
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131 | Sep) month=September; nummonth=9;; |
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132 | Oct) month=October; nummonth=10;; |
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133 | Nov) month=November; nummonth=11;; |
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134 | Dec) month=December; nummonth=12;; |
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135 | esac |
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136 | done |
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137 | |
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138 | test -n "$month" || error "failed parsing '$ls_command /' output" |
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139 | |
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140 | # Get the extended ls output of the file or directory. |
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141 | set dummy x`eval "$ls_command \"\\\$save_arg1\""` |
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142 | |
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143 | # Remove all preceding arguments |
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144 | eval $command |
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145 | |
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146 | # Because of the dummy argument above, month is in $2. |
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147 | # |
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148 | # On a POSIX system, we should have |
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149 | # |
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150 | # $# = 5 |
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151 | # $1 = file size |
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152 | # $2 = month |
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153 | # $3 = day |
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154 | # $4 = year or time |
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155 | # $5 = filename |
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156 | # |
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157 | # On Darwin 7.7.0 and 7.6.0, we have |
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158 | # |
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159 | # $# = 4 |
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160 | # $1 = day |
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161 | # $2 = month |
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162 | # $3 = year or time |
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163 | # $4 = filename |
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164 | |
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165 | # Get the month. |
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166 | case $2 in |
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167 | Jan) month=January; nummonth=1;; |
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168 | Feb) month=February; nummonth=2;; |
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169 | Mar) month=March; nummonth=3;; |
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170 | Apr) month=April; nummonth=4;; |
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171 | May) month=May; nummonth=5;; |
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172 | Jun) month=June; nummonth=6;; |
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173 | Jul) month=July; nummonth=7;; |
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174 | Aug) month=August; nummonth=8;; |
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175 | Sep) month=September; nummonth=9;; |
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176 | Oct) month=October; nummonth=10;; |
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177 | Nov) month=November; nummonth=11;; |
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178 | Dec) month=December; nummonth=12;; |
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179 | esac |
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180 | |
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181 | case $3 in |
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182 | ???*) day=$1;; |
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183 | *) day=$3; shift;; |
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184 | esac |
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185 | |
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186 | # Here we have to deal with the problem that the ls output gives either |
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187 | # the time of day or the year. |
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188 | case $3 in |
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189 | *:*) set `date`; eval year=\$$# |
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190 | case $2 in |
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191 | Jan) nummonthtod=1;; |
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192 | Feb) nummonthtod=2;; |
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193 | Mar) nummonthtod=3;; |
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194 | Apr) nummonthtod=4;; |
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195 | May) nummonthtod=5;; |
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196 | Jun) nummonthtod=6;; |
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197 | Jul) nummonthtod=7;; |
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198 | Aug) nummonthtod=8;; |
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199 | Sep) nummonthtod=9;; |
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200 | Oct) nummonthtod=10;; |
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201 | Nov) nummonthtod=11;; |
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202 | Dec) nummonthtod=12;; |
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203 | esac |
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204 | # For the first six month of the year the time notation can also |
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205 | # be used for files modified in the last year. |
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206 | if (expr $nummonth \> $nummonthtod) > /dev/null; |
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207 | then |
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208 | year=`expr $year - 1` |
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209 | fi;; |
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210 | *) year=$3;; |
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211 | esac |
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212 | |
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213 | # The result. |
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214 | echo $day $month $year |
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215 | |
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216 | # Local Variables: |
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217 | # mode: shell-script |
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218 | # sh-indentation: 2 |
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219 | # eval: (add-hook 'write-file-hooks 'time-stamp) |
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220 | # time-stamp-start: "scriptversion=" |
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221 | # time-stamp-format: "%:y-%02m-%02d.%02H" |
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222 | # time-stamp-time-zone: "UTC" |
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223 | # time-stamp-end: "; # UTC" |
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224 | # End: |
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